Failed to write lockfile content: Inappropriate ioctl for device (os error 25) on virtiofs shares in macOS guests #16846

Verify latest release

• I verified that the issue exists in the latest pnpm release

pnpm version

12.6.0

Which area(s) of pnpm are affected? (leave empty if unsure)

Lockfile

Link to the code that reproduces this issue or a replay of the bug

No response

Reproduction steps

In the share folder:

pnpm install
...
...
Error: ERR_PNPM_LOCKFILE_WRITE_FILE
  × installing dependencies
  ╰─▶ Failed to write lockfile content: Inappropriate ioctl for device (os error 25)

or you can use python to reproduce it:

python3 -c "import os,fcntl; fd=os.open('t',os.O_CREAT|os.O_WRONLY); fcntl.fcntl(fd,51)"
# OSError: [Errno 25] Inappropriate ioctl for device  (works on the guest's local disk)

Describe the Bug

pnpm 12.6.0, macOS guest in VirtualBuddy (Virtualization.framework), project on a virtiofs shared folder.

pnpm install fails when writing pnpm-lock.yaml. The cause is fcntl(F_FULLFSYNC), which Rust’s File::sync_all() uses on Apple platforms, returning ENOTTY on the share:

python3 -c "import os,fcntl; fd=os.open('t',os.O_CREAT|os.O_WRONLY); fcntl.fcntl(fd,51)"
# OSError: [Errno 25] Inappropriate ioctl for device  (works on the guest's local disk)

Suggested fix: when F_FULLFSYNC fails with ENOTTY/ENOTSUP/EINVAL, fall back to fsync(), as SQLite does. This also affects SMB shares.

Expected Behavior

pnpm install works properly.

Which Node.js version are you using?

v24.18.0

Which operating systems have you used?

• macOS
• Windows
• Linux

If your OS is a Linux based, which one it is? (Include the version if relevant)

No response

Contributing a fix

• I am working on a fix